Bug 1834687 (CVE-2020-12391)

Summary:	CVE-2020-12391 Mozilla: Content-Security-Policy bypass using object elements
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jhorak, security-response-team, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	firefox 76	Doc Type:	If docs needed, set a value
Doc Text:	The Mozilla Foundation Security Advisory describes this flaw as: Documents formed using `data:` URLs in an `object` element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-12 08:57:01 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1834683

Description msiddiqu 2020-05-12 08:52:09 UTC

Documents formed using `data:` URLs in an `object` element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/#CVE-2020-12391

Comment 1 msiddiqu 2020-05-12 08:52:13 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Giorgio Maone